N-Boc-piperazine-C3-COOH is widely used in organic synthesis as a versatile building block for the preparation of various pharmaceutical compounds. Its structure, featuring a Boc-protected piperazine ring and a carboxylic acid group, makes it valuable for designing and synthesizing drug molecules, particularly in the development of protease inhibitors, receptor antagonists, and other biologically active agents. The Boc group provides protection for the amine functionality during synthetic processes, allowing for selective reactions at other sites. The carboxylic acid moiety enables further derivatization, such as amide bond formation or esterification, facilitating the creation of diverse chemical libraries for drug discovery. Additionally, it is employed in the synthesis of peptidomimetics and other compounds targeting neurological and cardiovascular diseases. Its compatibility with solid-phase synthesis techniques also makes it useful in combinatorial chemistry and high-throughput screening applications.